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Curl_http_input_auth: require valid separator after negotiation type

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Closes #6993
This commit is contained in:
Harry Sintonen 2021-05-03 00:04:39 +03:00 committed by Daniel Stenberg
parent 8b9de77cd2
commit b75620b9a0
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GPG Key ID: 5CC908FDB71E12C2
1 changed files with 12 additions and 5 deletions
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17
lib/http.c
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@ -897,6 +897,11 @@ Curl_http_output_auth(struct Curl_easy *data,
* proxy CONNECT loop.
*/
static int is_valid_auth_separator(char ch)
{
return ch == '\0' || ch == ',' || ISSPACE(ch);
}
CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy,
const char *auth) /* the first non-space */
{
@ -940,7 +945,7 @@ CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy,
while(*auth) {
#ifdef USE_SPNEGO
if(checkprefix("Negotiate", auth)) {
if(checkprefix("Negotiate", auth) && is_valid_auth_separator(auth[9])) {
if((authp->avail & CURLAUTH_NEGOTIATE) ||
Curl_auth_is_spnego_supported()) {
*availp |= CURLAUTH_NEGOTIATE;
@ -966,7 +971,7 @@ CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy,
#endif
#ifdef USE_NTLM
/* NTLM support requires the SSL crypto libs */
if(checkprefix("NTLM", auth)) {
if(checkprefix("NTLM", auth) && is_valid_auth_separator(auth[4])) {
if((authp->avail & CURLAUTH_NTLM) ||
(authp->avail & CURLAUTH_NTLM_WB) ||
Curl_auth_is_ntlm_supported()) {
@ -1004,7 +1009,7 @@ CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy,
else
#endif
#ifndef CURL_DISABLE_CRYPTO_AUTH
if(checkprefix("Digest", auth)) {
if(checkprefix("Digest", auth) && is_valid_auth_separator(auth[6])) {
if((authp->avail & CURLAUTH_DIGEST) != 0)
infof(data, "Ignoring duplicate digest auth header.\n");
else if(Curl_auth_is_digest_supported()) {
@ -1026,7 +1031,8 @@ CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy,
}
else
#endif
if(checkprefix("Basic", auth)) {
if(checkprefix("Basic", auth) &&
is_valid_auth_separator(auth[5])) {
*availp |= CURLAUTH_BASIC;
authp->avail |= CURLAUTH_BASIC;
if(authp->picked == CURLAUTH_BASIC) {
@ -1039,7 +1045,8 @@ CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy,
}
}
else
if(checkprefix("Bearer", auth)) {
if(checkprefix("Bearer", auth) &&
is_valid_auth_separator(auth[6])) {
*availp |= CURLAUTH_BEARER;
authp->avail |= CURLAUTH_BEARER;
if(authp->picked == CURLAUTH_BEARER) {